Vibrator motors

ABSTRACT

A vibrator motor comprising a bipolar stator and a multipolar armature adapted to oscillate about a stationary shaft. The armature includes first and second parts independently adjustable relative to each other.

United States Patent [72] Inventor JanTimmerman Eindhoven, Netherlands[21] Appl. No. 488,616

[22] Filed Sept. 20, 1965 [45] Patented Mar. 23, 1971 [73] Assignee U.S.Philips Corporation New York, N.Y.

[32] Priority Sept. 23, 1964 [3 3] Netherlands [5 4] VIBRATOR MOTORS 9Claims, 3 Drawing Figs.

[52] US. Cl 310/29, 310/36 [51] Int. Cl H02k 33/00 9 {I \t d: 3 I

[50] Field ofSearch .1 310/21, 29, 36, 38; 30/4 91, (lnquired) [56]References Cited UNITED STATES PATENTS 3,105,163 9/1963 Camp 310/293,343,011 9/1967 Daniels et a1. 310/29X Primary ExaminerD. F. DugganAttorney-Frank R. Trifari ABSTRACT: A vibrator motor comprising abipolar stator and a multipolar armature adapted to oscillate about astationary shaft. The armature includes first and second partsindependently adjustable relative to each other.

PATENTED'MAR23 |97| FIG.1

FIG.2

INVENTOR.

JAN TIM MERMAN AGE T vraaaron Morons The invention relates to a vibratormotor for use in a dryshaving apparatus. Such motors consist of aV-shaped, bipolar stator and a bipolar or multipolar armature located inthe plane of the stator and adapted to oscillate about a stationaryshaft, and on each side of a plane going through the centerline of theshaft at the center of the stator there is arranged an elastic body,preferably a spring, which bears on the armature atone end and the otherend bears on a fixed base.

Such a construction of a vibrator motor is known. In order to obtain thecorrect position of the armature with respect to the stator, the elasticbodies and particularly springs, must be adjustable. The force exertedby the stator on the armature is at the maximum, when the armature is inthe rest position with one of the armature poles, intersecting one ofthe sides of the stator pole. By providing adjustability of one springor both, this position can be reached as near as possible.

In practice, it is found that owing to the tolerances of length andrigidity of the springs, and in the case of mass production of highprecision, adjustment of the springs of each unit is necessary.Moreover, the adjustability of the springs is desira-' ble for obtaininga correct natural frequency of the armature system. However,particularly in mass production, adjustment of the springs can by madeonly with difficulty and then only by skilled persons. Even if only oneof the springs is adjustable it is not easy to attain the correctadjustment. The invention has for its object to simplify correctarmature adjustment. To this end, in accordance with the invention, thepoles of the armature of a vibrator motor, particularly of the kind setforth, are adjustably connected with the body of the armature so thatthe armature pole is movable with respect to the armature body.

The invention will be described with reference to the drawing, whichshows a presently preferred embodiment of the invention and in which:

MG. 1 shows two stator poles with the associated armature poles if avibrator motor;

MG. 2 is a partly diagrammatic front view of a vibrator motor; and

FIG. 3 is a sectional view of the motor of FIG. 2 taken on the lineIll-III in the direction of the arrow.

Referring to FKG. 1, reference numeral 1 designates part of a statorhaving two stator poles 2 and coils 3 arranged thereon. An armature 4(shown in its rest position) with two poles 5 is adapted to rotate abouta shaft 6 and is loaded by two pressure springs 7, each of which bearson a fixed base 8.

When the stator 1 is energized by an alternating current the armatureoscillates about the shaft 6. It has been found that the force exertedby the stator on the armature is at a maximum when the armature is inthe rest position and one of the armature poles is intersecting one ofthe sides of the stator poles. This means that the distance a of HG. lis at a minimum and preferably zero. Since in the mass production ofsuch motors all parts and particularly the springs have certaintolerances in dimensions and properties, it is necessary to adjust theposition of the armature with respect to the stator. A simple structureaccording to the invention for performing this adjustment is shown inH65. 2 and 3 to which reference is now made. A half housing 9accommodates the stator i with poles 2 and coils 3. A stator yoke 10 issecured to a shoulder 12 on the housing by means of two screws 111.

The armature consists of a body 14, provided with two collars l3, whichbody is adapted to rotate about a pin 15 which is secured to a shoulder16 provided on the housing 9. The body 114% is provided with a catchingpin 17, which may for example drive the knife of a dry-shaving apparatus(not shown). Two armatures side plates 18 are adapted to turn about thecollars i3. Between the armature side plates 18 there is arranged a pairof laminated armature poles T9. The two side plates 1% and the laminatedportion 119 are interconnected by rivets 2h.

The assembly of side plates 18 and the laminated poles 19 is movabiyfixed relative to the body 114 by means of a screw bolt 2i. Theapertures 22 in the side plates l8 through which bolt 21 extends arearcuately elongated as seen in FIG. 2. The armature body id is engagedby pressure springs 23 located on each side of the body M. The other endof these springs bear on two supports 24 rigidly secured to the housing.

The correct adjustment of the armature with respect to the stator is nowquite simple. When the volt 21 is loosened, the side plates 18 with thearmature poles 19 can be turned about the collars 13 so that thearmature poles are displaced relatively to the armature body as well asthe stator poles so that the distance a (FIG. 1) is at a minimum. Thenthe screw bolt 21 is tightened and the whole armature is then in itscorrect position relative to the stator. This adjustment can beperformed by means of simple expedients by unskilled labor. The assemblyis particularly suitable for mass production of large numbers of suchmotors.

Iclaim:

1. In a vibratory motor, a pivot shaft, a magnetic fieldgeneratingstator having arcuate pole faces adapted to be fixed centered on theaxis of said shaft, a rotor unit including an armature member pivotallymounted on said shaft for oscillation, said armature member havingarcuate pole faces cen' tered on said axis for movement with respect tosaid stator pole faces from an at rest position whereat said armaturepole faces overlap said stator pole faces by a predetermined degree ofentry, said rotor unit further including an oscillator member pivotallymounted on said shaft and a driving arm extending from said oscillatormember adapted for coaction with selected working means when saidoscillator member is moved from an at rest position, said oscillatormember and said armature member adapted for pivotal adjustment on saidshaft individually and independently of each other for respectivelypositioning said driving arm and armature pole faces at their selectedat rest positions, and means carried by said armature member and saidoscillator member for securing said oscillator member to said armaturemember in said respective adjusted at rest positions for vibratorypivotal oscillation in unison on said shaft.

2. The combination of claim 1 wherein the armature member includes apair of spaced support arms having apertures for pivotally mounting saidarmature member on said pivot shaft, said oscillator member beingpivotally received between said arms, at least one of said arms having aslot defining an oversized opening for receiving a fastener member at aside of said oscillator member.

3. A vibratory motor comprising, support means, a stator carried by saidsupport means, said stator having spaced ends provided with pole faces,a shaft mounted on said support means, a vibratory rotor unit mounted onsaid shaft, said rotor unit including an armature member having polefaces complementary to said stator pole faces, said rotor unit furtherincluding an oscillator member having a drive arm extending therefrom,means mounting said oscillator and armature adjacent each other on saidshaft for movement individually of each other about said shaft, springmeans supported at one end by said support means and at their oppositeends extending towards and engaging said rotor unit to maintain saidoscillator member and said armature member at initial at rest positionson said shaft, said armature member being pivotally adjustable on saidmounting means about said shaft away from the at rest position of theoscillator member to adjust the position of the armature pole faces at aselected overlap relationship with said stator pole faces, and meanscarried by said rotor unit for securing said armature member to saidoscillator member in the adjusted position of said armature member andthe initial at rest position of said oscillator member for vibratorypivotal movement in unison on said shaft.

A vibratory motor, comprising a U-shaped electromagnetic stator providedwith arcuate pole faces on the ends of the spaced legs thereof, a shaft,an oscillator member pivotally mounted on said shaft and having at leastone drive arm extending therefrom, spring means maintaining saidoscillator member in a selected at rest position on said shaft, anarmature member including a first portion provided with complementaryarmature pole faces centered on the axis of said shaft and a secondportion comprising a pair of hanger arms pivotally mounting saidarmature on said shaft adjacent said oscillator, said armature memberbeing pivotal on said hanger arms about said shaft relative to saidoscillator to an adjusted moved position to establish a predetermined atrest position of said armature pole faces relative to said stator polefaces, and means carried by said armature and said oscillator forsecuring said armature member to said oscillator member against relativemovement with respect to each other in the adjusted at rest positions ofsaid members.

5. A vibratory motor for an electric shaver or the like, comprisingsupport means, a U-shaped magnetic field stator mounted in fixedposition on said support means and having arcuate pole faces on the endsof the legs thereof, a pivot shaft mounted on said support means and incentered relationship to said stator pole faces, an oscillator memberpivotally mounted on said pivot shaft and having a drive arm extendingtherefrom adapted for driving engagement with a shaver cutter or thelike, a pair of compression springs mounted on said support means andengaging opposite side surfaces of said oscillator member to establishan initial at rest position of said oscillator on said shaft, anarmature member pivotally mounted on said shaft adjacent said oscillatorand having arcuate pole faces complementary to said stator pole faces,said armature member being pivotally adjustable on said shaftindependently of said oscillator member in said at test position thereoffor establishing a selected degree of entry of said armature pole facesrelative to said stator pole faces, and means carried by said membersfor securing said armature and oscillator together in the adjustedposition of the armature and the at rest position of the oscillator forvibratory pivotal movement in unison on said shaft.

6. A vibrator motor comprising a V-shaped, bipolar stator and amultipolar armature lying in the stator plane and adapted to oscillateabout a stationary shaft, an elastic body engaging each side of saidarmature for urging said armature into its rest position, said armaturecomprising an armature body portion, a pair of armature pole portions,and connection means for connecting said pole portions and said armaturebody for relative movement, the connection means including a pair ofside plates one on each side of the armature body portion, collar meanslocated on the armature body concentrically with the stationary shaftfor movably supporting said side plates, means for removably fixing saidside plates relative to said armature body portion, and means forsecuring said pole portions between said side plates.

7. An electric vibrator motor operable from a source of electric power,comprising:

a. a frame;

b. a stator with at least two spaced pole faces;

0. a shaft secured to the frame;

d. an armature pivotable between at rest and activated positions,including (i) a first part having spaced pole faces corresponding to thepole faces of the stator, this part pivotally mounted on the shaft withthe pole faces thereof movable adjacent an and relative to the statorpole faces, and (ii) a body part mounted on said shaft for pivotalmovement independent of the first part to selected pivot positionsrelative to the body part;

e. means for fixedly securing together as a unit the first part to thebody part in one of said selected positions; and

f. spring means engaging the frame and said armature unit for urgingsaid unit toward said at rest position.

8. A motor according to claim 7 wherein the armature unit first part andbody part are pivotable in generally parallel and adjacent planes.

9. An electric vibrator motor operable from a source of electric power,comprising:

a. a frame;

b. a stator with at least two spaced pole faces;

c. a shaft secured to the frame; d. an armaturemcludmg (r) a first partpivotal about said shaft with pole faces corresponding to those of thestator and movable between at rest and activated positions relative tothe stator pole faces, (ii) a second part movable to selected positionsrelative to the first part, and (iii) means for fixedly securingtogether as a unit the first and second parts in one of said selectedpositions; and

e. spring means engaging the frame and said armature unit for urgingsaid unit to an at rest position.

1. In a vibratory motor, a pivot shaft, a magnetic fieldgeneratingstator having arcuate pole faces adapted to be fixed centered on theaxis of said shaft, a rotor unit including an armature member pivotallymounted on said shaft for oscillation, said armature member havingarcuate pole faces centered on said axis for movement with respect tosaid stator pole faces from an at rest position whereat said armaturepole faces overlap said stator pole faces by a predetermined degree ofentry, said rotor unit further including an oscillator member pivotallymounted on said shaft and a driving arm extending from said oscillatormember adapted for coaction with selected working means when saidoscillator member is moved from an at rest position, said oscillatormember and said armature member adapted for pivotal adjustment on saidshaft individually and independently of each other for respectivelypositioning said driving arm and armature pole faces at their selectedat rest positions, and means carried by said armature member and saidoscillator member for securing said oscillator member to said armaturemember in said respective adjusted at rest positions for vibratorypivotal oscillation in unison on said shaft.
 2. The combination of claim1 wherein the armature member includes a pair of spaced support armshaving apertures for pivotally mounting said armature member on saidpivot shaft, said oscillator member being pivotally received betweensaid arms, at least one of said arms having a slot defining an oversizedopening for receiving a fastener member at a side of said oscillatormember.
 3. A vibratory motor comprising, support means, a stator carriedby said support means, said stator having spaced ends provided with polefaces, a shaft mounted on said support means, a vibratory rotor unitmounted on said shaft, said rotor unit including an armature memberhaving pole faces complementary to said stator pole faces, said rotorunit further including an oscillator member having a drive arm extendingtherefrom, means mounting said oscillator and armature adjacent eachother on said shaft for movement individually of eaCh other about saidshaft, spring means supported at one end by said support means and attheir opposite ends extending towards and engaging said rotor unit tomaintain said oscillator member and said armature member at initial atrest positions on said shaft, said armature member being pivotallyadjustable on said mounting means about said shaft away from the at restposition of the oscillator member to adjust the position of the armaturepole faces at a selected overlap relationship with said stator polefaces, and means carried by said rotor unit for securing said armaturemember to said oscillator member in the adjusted position of saidarmature member and the initial at rest position of said oscillatormember for vibratory pivotal movement in unison on said shaft.
 4. Avibratory motor, comprising a U-shaped electromagnetic stator providedwith arcuate pole faces on the ends of the spaced legs thereof, a shaft,an oscillator member pivotally mounted on said shaft and having at leastone drive arm extending therefrom, spring means maintaining saidoscillator member in a selected at rest position on said shaft, anarmature member including a first portion provided with complementaryarmature pole faces centered on the axis of said shaft and a secondportion comprising a pair of hanger arms pivotally mounting saidarmature on said shaft adjacent said oscillator, said armature memberbeing pivotal on said hanger arms about said shaft relative to saidoscillator to an adjusted moved position to establish a predetermined atrest position of said armature pole faces relative to said stator polefaces, and means carried by said armature and said oscillator forsecuring said armature member to said oscillator member against relativemovement with respect to each other in the adjusted at rest positions ofsaid members.
 5. A vibratory motor for an electric shaver or the like,comprising support means, a U-shaped magnetic field stator mounted infixed position on said support means and having arcuate pole faces onthe ends of the legs thereof, a pivot shaft mounted on said supportmeans and in centered relationship to said stator pole faces, anoscillator member pivotally mounted on said pivot shaft and having adrive arm extending therefrom adapted for driving engagement with ashaver cutter or the like, a pair of compression springs mounted on saidsupport means and engaging opposite side surfaces of said oscillatormember to establish an initial at rest position of said oscillator onsaid shaft, an armature member pivotally mounted on said shaft adjacentsaid oscillator and having arcuate pole faces complementary to saidstator pole faces, said armature member being pivotally adjustable onsaid shaft independently of said oscillator member in said at restposition thereof for establishing a selected degree of entry of saidarmature pole faces relative to said stator pole faces, and meanscarried by said members for securing said armature and oscillatortogether in the adjusted position of the armature and the at restposition of the oscillator for vibratory pivotal movement in unison onsaid shaft.
 6. A vibrator motor comprising a V-shaped, bipolar statorand a multipolar armature lying in the stator plane and adapted tooscillate about a stationary shaft, an elastic body engaging each sideof said armature for urging said armature into its rest position, saidarmature comprising an armature body portion, a pair of armature poleportions, and connection means for connecting said pole portions andsaid armature body for relative movement, the connection means includinga pair of side plates one on each side of the armature body portion,collar means located on the armature body concentrically with thestationary shaft for movably supporting said side plates, means forremovably fixing said side plates relative to said armature bodyportion, and means for securing said pole portions between said sideplates.
 7. An electric vibrator motor operable from a source Of electricpower, comprising: a. a frame; b. a stator with at least two spaced polefaces; c. a shaft secured to the frame; d. an armature pivotable betweenat rest and activated positions, including (i) a first part havingspaced pole faces corresponding to the pole faces of the stator, thispart pivotally mounted on the shaft with the pole faces thereof movableadjacent an and relative to the stator pole faces, and (ii) a body partmounted on said shaft for pivotal movement independent of the first partto selected pivot positions relative to the body part; e. means forfixedly securing together as a unit the first part to the body part inone of said selected positions; and f. spring means engaging the frameand said armature unit for urging said unit toward said at restposition.
 8. A motor according to claim 7 wherein the armature unitfirst part and body part are pivotable in generally parallel andadjacent planes.
 9. An electric vibrator motor operable from a source ofelectric power, comprising: a. a frame; b. a stator with at least twospaced pole faces; c. a shaft secured to the frame; d. an armatureincluding (i) a first part pivotal about said shaft with pole facescorresponding to those of the stator and movable between at rest andactivated positions relative to the stator pole faces, (ii) a secondpart movable to selected positions relative to the first part, and (iii)means for fixedly securing together as a unit the first and second partsin one of said selected positions; and e. spring means engaging theframe and said armature unit for urging said unit to an at restposition.